FKIE_CVE-2023-31248

Vulnerability from fkie_nvd - Published: 2023-07-05 19:15 - Updated: 2026-06-17 05:56
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace
References
security@ubuntu.comhttp://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.htmlThird Party Advisory, VDB Entry
security@ubuntu.comhttp://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.htmlThird Party Advisory, VDB Entry
security@ubuntu.comhttp://www.openwall.com/lists/oss-security/2023/07/05/2Mailing List, Third Party Advisory
security@ubuntu.comhttps://lists.debian.org/debian-lts-announce/2023/08/msg00001.htmlThird Party Advisory, VDB Entry
security@ubuntu.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGZC5XOANA75OJ4XARBBXYSLDKUIJI5E/Mailing List
security@ubuntu.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPHI46ROSSLVAV4R5LJWJYU747JGOS6D/Mailing List
security@ubuntu.comhttps://lore.kernel.org/netfilter-devel/20230705121627.GC19489@breakpoint.cc/T/Patch
security@ubuntu.comhttps://security.netapp.com/advisory/ntap-20240201-0001/
security@ubuntu.comhttps://www.debian.org/security/2023/dsa-5453Third Party Advisory
security@ubuntu.comhttps://www.openwall.com/lists/oss-security/2023/07/05/2Mailing List
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.htmlThird Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.htmlThird Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/07/05/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/08/msg00001.htmlThird Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGZC5XOANA75OJ4XARBBXYSLDKUIJI5E/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPHI46ROSSLVAV4R5LJWJYU747JGOS6D/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lore.kernel.org/netfilter-devel/20230705121627.GC19489@breakpoint.cc/T/Patch
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20240201-0001/
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2023/dsa-5453Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2023/07/05/2Mailing List
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
fedoraproject fedora 37
fedoraproject fedora 38
debian debian_linux 11.0
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
canonical ubuntu_linux 18.04
canonical ubuntu_linux 20.04
canonical ubuntu_linux 22.04
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "platforms": [
            "Linux"
          ],
          "product": "Linux Kernel",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "v5.9-rc1"
            }
          ]
        }
      ],
      "source": "security@ubuntu.com"
    }
  ],
  "configurations": [
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace"
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de Escalada de Privilegios Locales de Use-After-Free de Linux nftables; \u0027nft_chain_lookup_byid()\u0027 no pudo comprobar si una cadena estaba activa y CAP_NET_ADMIN est\u00e1 en cualquier espacio de nombres de usuario o red\n"
    }
  ],
  "id": "CVE-2023-31248",
  "lastModified": "2026-06-17T05:56:40.693",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "security@ubuntu.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
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          "attackVector": "LOCAL",
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          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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    "ssvcV203": [
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        "ssvcData": {
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          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-03-05T18:36:50.820740Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-07-05T19:15:09.713",
  "references": [
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      "tags": [
        "Third Party Advisory",
        "VDB Entry"
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      "url": "http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html"
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  "vulnStatus": "Modified",
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          "lang": "en",
          "value": "CWE-416"
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      "source": "nvd@nist.gov",
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  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.